The diameter of the base of cone is 10 cm and its slant height is 17 cm. Then the curved surface area of the cone is ………. cm².

The volume of sphere is in 4/3 π cm³. Then its diameter is ………. cm.

The volume of cone with radius 2 cm and height 6 cm is ……….. cm³.

The diameter and the height of the cylinder are 14 cm and 10 cm respectively. Then the total surface area is ……….. cm².

The ratio of the radii of two cones having equal height is 2 : 3. Then, the ratio of their volumes is ……..